1
LT1313
Dual PCMCIA
VPP Driver/Regulator
■
Digital Selection of 0V, V
CC
, 12V or Hi-Z
■
Output Current Capability: 120mA
■
Internal Current Limiting and Thermal Shutdown
■
Automatic Switching from 3.3V to 5V
■
Powered from Unregulated 13V to 20V Supply
■
Logic Compatible with Standard PCMCIA Controllers
■
Output Capacitors: 1µF
■
Quiescent Current in Hi-Z or 0V Mode: 60µA
■
Independent VPP Valid Status Feedback Signals
■
No VPP Overshoot
The LT
®
1313 is a member of Linear Technology
Corporation’s PCMCIA driver/regulator family. It provides
0V, 3.3V, 5V, 12V and Hi-Z regulated power to the VPP
pins of two PCMCIA card slots from a single unregulated
13V to 20V supply. When used in conjunction with a PC Card
Interface Controller, the LT1313 forms a complete minimum
component-count interface for palmtop, pen-based and note-
book computers. The two VPP output voltages are inde-
pendently selected by four logic compatible digital inputs
which interface directly with industry standard PC Card
Interface Controllers.
Automatic 3.3V to 5V switching is provided by two inde-
pendent comparators which continuously monitor each
PC card V
CC
supply voltage and automatically adjust the
VPP output to match the associated V
CC
pin voltage when
the VPP = V
CC
mode is selected.
Two open-collector VPP VALID outputs are provided to
indicate when the VPP outputs are in regulation at 12V.
The LT1313 is available in 16-pin SO packaging.
FEATURES
DESCRIPTION
U
■
Notebook Computers
■
Palmtop Computers
■
Pen-Based Computers
■
Handi-Terminals
■
Bar-Code Readers
■
Flash Memory Programming
APPLICATIONS
U
TYPICAL APPLICATION
U
VPP1
VPP2
PCMCIA
CARD SLOT
#1
V
CC
VPP1
VPP2
PCMCIA
CARD SLOT
#2
V
CC
ASENSE
AVPP
OUT
GND GND
LT1313
V
S
V
S
AVALID
AEN0
AEN1
BSENSE
BVPP
OUT
BVALID
BEN0
BEN1
13V TO 20V
+
1µF
TANTALUM
1µF
TANTALUM
DUAL PCMCIA
CARD SLOT
CONTROLLER
+
0.1µF
3.3V/5V
3.3V/5V
1313 TA01
Typical PCMCIA Dual Slot VPP Driver
DEVICE DESCRIPTION PACKAGE
LT1312 SINGLE PCMCIA VPP DRIVER/REGULATOR 8-PIN SO
LT1313 DUAL PCMCIA VPP DRIVER/REGULATOR 16-PIN SO*
LTC®1314 SINGLE PCMCIA SWITCH MATRIX 14-PIN SO
LTC1315 DUAL PCMCIA SWITCH MATRIX 24-PIN SSOP
LTC1470 PROTECTED V
CC
5V/3.3V SWITCH MATRIX 8-PIN SO
LTC1472 PROTECTED V
CC
AND VPP SWITCH MATRIX 16-PIN SO*
*NARROW BODY
Linear Technology PCMCIA Product Family
, LTC and LT are registered trademarks of Linear Technology Corporation.
2
LT1313
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VPP
OUT
Output Voltage Program to 12V, I
OUT
≤ 120mA (Note 2) ●11.52 12.00 12.48 V
Program to 5V, I
OUT
≤ 30mA (Note 2) ●4.75 5.00 5.25 V
Program to 3.3V, I
OUT
≤ 30mA (Note 2) ●3.135 3.30 3.465 V
Program to 0V, I
OUT
= –300µA 0.42 0.60 V
I
LKG
Output Leakage Program to Hi-Z, 0V ≤ VPP
OUT
≤ 12V ●–10 10 µA
I
S
Supply Current Both Channels Programmed to 0V ●60 100 µA
Both Channels Programmed to Hi-Z ●60 100 µA
One Channel Programmed to 12V, No Load (Note 3) ●260 400 µA
One Channel Programmed to 5V, No Load (Note 3) ●105 150 µA
One Channel Programmed to 3.3V, No Load (Note 3) ●85 120 µA
One Channel Programmed to 12V, I
OUT
= 120mA (Note 3) ●126 132 mA
One Channel Programmed to 5V, I
OUT
= 30mA (Note 3) ●31 33 mA
One Channel Programmed to 3.3V, I
OUT
= 30mA (Note 3) ●31 33 mA
I
LIM
Current Limit Program to 3.3V, 5V or 12V (Note 3) 330 500 mA
V
ENH
Enable Input High Voltage ●2.4 V
V
ENL
Enable Input Low Voltage ●0.4 V
I
ENH
Enable Input High Current 2.4V ≤ V
IN
≤ 5.5V 20 50 µA
I
ENL
Enable Input Low Current 0V ≤ V
IN
≤ 0.4V 0.01 1 µA
V
SEN5
V
CC
Sense Threshold VPP
OUT
= 3.3V to 5V (Note 4) ●3.60 4.05 4.50 V
V
SEN3
V
CC
Sense Threshold VPP
OUT
= 5V to 3.3V (Note 4) ●3.60 4.00 4.50 V
I
SEN
V
CC
Sense Input Current V
SENSE
= 5V 38 60 µA
V
SENSE
= 3.3V 18 30 µA
V
VALID TH
VPP
VALID
Threshold Voltage Program to 12V, (Note 5) ●10.5 11 11.5 V
I
VALID
VPP
VALID
Output Drive Current Program to 12V, V
VALID
= 0.4V, (Note 5) 1 3.3 mA
VPP
VALID
Output Leakage Current Program to 0V, V
VALID
= 12V, (Note 5) 0.1 10 µA
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Supply Voltage ........................................................ 22V
Digital Input Voltage ........................ 7V to (GND – 0.3V)
Sense Input Voltage......................... 7V to (GND – 0.3V)
VALID Output Voltage.................... 15V to (GND – 0.3V)
Output Short-Circuit Duration.......................... Indefinite
Operating Temperature ................................ 0°C to 70°C
Junction Temperature................................ 0°C to 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
PACKAGE/ORDER INFORMATION
W
UU
ELECTRICAL CHARACTERISTICS
VS = 13V to 20V, TA = 25
°
C (Note 1), unless otherwise noted.
The ● denotes the specifications which apply over the full operating
temperature range.
Note 1: Both V
S
pins (10, 14) must be connected together, and both
ground pins (1, 5) must be connected together.
Note 2: For junction temperatures greater than 110°C, a minimum
load of 1mA is recommended.
Note 3: The other channel is programmed to the 0V mode (XEN0 =
XEN1 = 0V) during this test.
Note 4: The V
CC
sense threshold voltage tests are performed
independently.
Note 5: The VPP
VALID
tests are performed independently.
T
JMAX
= 125°C, θ
JA
= 100°C/ W
LT1313CS
ORDER PART
NUMBER
Consult factory for Industrial and Military grade parts.
1
2
3
4
5
6
7
8
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
16
15
14
13
12
11
10
9
GND
AEN0
AEN1
AVALID
GND
BEN0
BEN1
BVALID
AVPP
OUT
NC
V
S
ASENSE
BVPP
OUT
NC
V
S
BSENSE
3
LT1313
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Quiescent Current
(0V or Hi-Z Mode)
SUPPLY VOLTAGE (V)
0
QUIESCENT CURRENT (µA)
60
80
100
20
LT1313 G1
40
20
0510 15 25
T
J
= 25°C
BOTH CHANNELS PROGRAMMED TO 0V
OR BOTH CHANNELS PROGRAMMED TO Hi-Z
SUPPLY VOLTAGE (V)
0
QUIESCENT CURRENT (µA)
150
200
250
20
1313 G03
100
50
0510 15 25
T
J
= 25°C
ONE CHANNEL PROGRAMMED TO
VPP = V
CC
. OTHER CHANNEL IN 
0V OR Hi-Z MODE
R
L
=
∞
V
SENSE
= 5V
V
SENSE
= 3.3V
Ground Pin Current (5V Mode)Ground Pin Current (12V Mode)
Ground Pin Current Current Limit
INPUT VOLTAGE (V)
0
SHORT-CIRCUIT CURRENT (mA)
300
400
500
15 25
1313 G08
200
100
0510 20
600
700
800 T
J
= 25°C
XVPP
OUT
= 0V
SINGLE CHANNEL
Current Limit
JUNCTION TEMPERATURE (°C)
0
SHORT-CIRCUIT CURRENT (mA)
600
500
400
300
200
100
025 50 75 100
1313 G09
125
V
S
= 15V
XVPP
OUT
= 0V
SINGLE CHANNEL
SUPPLY VOLTAGE (V)
0
GROUND CURRENT (mA)
2.5
2.0
1.5
1.0
0.5
020
1313 G06
510 15 25
T
J
= 25°C
3.3V MODE
SINGLE OUTPUT
V
SENSE
= 3.3V
R
L
= 110Ω
I
L
= 30mA*
*FOR VPP
OUT
= 3.3V
R
L
= 330Ω
I
L
= 10mA*
SUPPLY VOLTAGE (V)
0
GROUND CURRENT (mA)
2.5
2.0
1.5
1.0
0.5
020
1313 G05
510 15 25
T
J
= 25°C
5V MODE
SINGLE OUTPUT
V
SENSE
= 5V
R
L
= 167Ω
I
L
= 30mA*
*FOR VPP
OUT
= 5V
R
L
= 500Ω
I
L
= 10mA*
Ground Pin Current (3.3V Mode)
Quiescent Current (3.3V/5V Mode)Quiescent Current (12V Mode)
SUPPLY VOLTAGE (V)
0
QUIESCENT CURRENT (µA)
300
400
500
20
1313 G02
200
100
0510 15 25
T
J
= 25°C
ONE CHANNEL PROGRAMMED TO 12V
OTHER CHANNEL IN 0V OR Hi-Z MODE
R
L
=
∞
SUPPLY VOLTAGE (V)
0
GROUND CURRENT (mA)
10
8
6
4
2
020
1313 G04
510 15 25
T
J
= 25°C
12V MODE
SINGLE OUTPUT 
R
L
= 200Ω
I
L
= 60mA*
*FOR VPP
OUT
= 12V
R
L
= 400Ω
I
L
= 30mA*
R
L
= 100Ω
I
L
= 120mA*
OUTPUT CURRENT (mA)
0
GROUND PIN CURRENT (mA)
160
1313 G07
40 80 120
16
14
12
10
8
6
4
2
020 60 100 140
T
J
= 25°C
V
S
= 15V
SINGLE CHANNEL
4
LT1313
TYPICAL PERFORMANCE CHARACTERISTICS
UW
JUNCTION TEMPERATURE (°C)
0
V
CC
SENSE THRESHOLD VOLTAGES (V)
5.5
5.0
4.5
4.0
3.5
3.0
2.5 25 50 75 100
1313 G12
125
T
J
= 25°C
V
S
= 15V
SWITCH TO 5V
SWITCH TO 3.3V
VCC Sense Threshold Voltage
FREQUENCY (Hz)
10
RIPPLE REJECTION RATIO (dB)
100 1k 10k 100k 1M
1313 G15
100
80
60
40
20
0
T
J
= 25°C, 12V MODE
V
S
= 15V + 100mV
RMS
RIPPLE
C
OUT
= 1µF TANTALUM
Ripple Rejection (12V)
TIME (ms)
–0.2 0 0.2 0.4 0.6 0.8 1.0 1.2
OUTPUT VOLTAGE (V)EN0 INPUT (V)
12.4
12.2
12.0
11.8
11.6
5
0
1313 G16
COUT = 1µFCOUT = 10µF
VS = 15V
12V Turn-On Waveform
TIME (ms)
–0.1 0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT VOLTAGE
CHANGE (mV)
SUPPLY
VOLTAGE (V)
40
20
0
–20
–40
15
13
1313 G17
C
OUT
= 1µF
C
OUT
= 10µF
Line Transient Response (12V)
TIME (ms)
–0.1 0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT VOLTAGE
CHANGE (V)
LOAD
CURRENT (mA)
0.4
0.2
0
–0.2
–0.4
100
50
1313 G18
C
OUT
= 1µF
C
OUT
= 10µF
Load Transient Response (12V)
VALID OUTPUT CURRENT (mA)
0
VALID OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
00.5 1.0 1.5 2.0
1313 G14
2.5 3.0
T
J
= 25°C
V
S
= 15V
12V MODE
VALID Output Voltage
Enable Input Current
ENABLE INPUT VOLTAGE (V)
0
ENABLE INPUT CURRENT (µA)
50
40
30
20
10
01234
1313 G11
56
T
J
= 25°C
V
S
= 15V
Enable Input Threshold Voltage
JUNCTION TEMPERATURE (°C)
0
INPUT THRESHOLD VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
025 50 75 100
1313 G10
125
V
S
= 15V
VCC Sense Input Current
V
CC
SENSE INPUT VOLTAGE (V)
0
V
CC
SENSE INPUT CURRENT (µA)
50
40
30
20
10
01234
1313 G13
56
T
J
= 25°C
V
S
= 15V
5
LT1313
PIN FUNCTIONS
UUU
Supply Pins: Power is supplied to the device through the
two supply pins
which must be connected together at all
times .
The supply pins should be bypassed to ground if
the device is more than six inches away from the main
supply capacitor. A bypass capacitor in the range of 0.1µF
to 1µF is sufficient. The supply voltage to the LT1313 can
be loosely regulated between 13V and 20V.
VPP
OUT
Pins: Each regulated output supplies power to the
two PCMCIA card VPP pins which are typically tied to-
gether at the socket. Each VPP
OUT
output is current limited
to approximately 330mA. Thermal shutdown provides a
second level of protection. A 1µF to 10µF tantalum output
capacitor is recommended.
Input Enable Pins: The four digital input pins are high
impedance inputs with approximately 20µA input current
at 2.4V. The input thresholds are compatible with CMOS
controllers and can be driven from either 5V or 3.3V CMOS
logic. ESD protection diodes limit input excursions to 0.6V
below ground.
VALID Output Pins: These pins are open-collector NPN
outputs which are driven low when the corresponding
VPP
OUT
pin is in regulation, i.e., when it is above 11V. Two
external 51k pull-up resistors are connected between
these outputs and the same 5V or 3.3V logic supply
powering the PCMCIA compatible control logic.
V
CC
Sense Pins: Two independent comparators and 4V
references automatically switch the VPP
OUT
outputs from
5V to 3.3V depending upon the voltage sensed at the
corresponding PCMCIA card socket V
CC
pin. The input
current for these pins is approximately 30µA. For 5V only
operation, connect the Sense pins directly to ground. An
ESD protection diode limits the input voltage to 0.6V below
ground.
Ground Pins:
The two ground pins must be connected
together at all times.
BLOCK DIAGRAM
W
(One Channel)
–
+
–
+
XVPPOUT
XVCC SENSE
VS
XEN0
XEN1
XVALID
1313 BD
11V
LOW DROPOUT
LINEAR
REGULATOR
VOLTAGE
LOGIC CONTROL
4V
X = A OR B
6
LT1313
OPERATION
U
The LT1313 is two programmable output voltage, low-
dropout linear regulators designed specifically for PCMCIA
VPP drive applications. Input power is typically obtained
from a loosely regulated input supply between 13V and
20V. The LT1313 consists of the following blocks:
Two Low Dropout Voltage Linear Regulators: The heart
of the LT1313 is two PNP-based low-dropout voltage
regulators which drop the unregulated supply voltage
from 13V to 20V down to 12V, 5V, 3.3V, 0V or Hi-Z
depending upon the state of the four Enable inputs and the
two V
CC
Sense inputs. The regulators have built-in current
limiting and thermal shutdown to protect the device, the
loads, and the sockets against inadvertent short circuiting
to ground.
Voltage Control Logic: The two VPP
OUT
outputs have five
possible output modes: 0V, 3.3V, 5V, 12V and Hi-Z. These
five modes are selected by the four Enable inputs and the
two V
CC
Sense inputs as described by the Truth Table.
V
CC
Sense Comparators: When the V
CC
mode is selected,
the LT1313 automatically adjusts each regulated VPP
output
voltage to 3.3V or 5V depending upon the voltage present
at the corresponding PC card V
CC
supply pin. The thresh-
old voltage for these comparators is set at 4V and there is
approximately 50mV of hysteresis provided to ensure
clean switching between 3.3V and 5V.
VPP
VALID Comparator: Two voltage comparators moni-
tor each output voltage when the 12V mode is selected and
are driven low when the output is in regulation above 11V.
These two outputs function separately.
AEN0 AEN1 ASENSE AVPP
OUT
AVALID
00 X 0V 1
1 0 X 12V 0
0 1 3.0V to 3.6V 3.3V 1
0 1 4.5V to 5.5V 5V 1
1 1 X Hi-Z 1
X = Don’t Care
LT1313 Truth Table
BEN0 BEN1 BSENSE BVPP
OUT
BVALID
00 X 0V 1
1 0 X 12V 0
0 1 3.0V to 3.6V 3.3V 1
0 1 4.5V to 5.5V 5V 1
1 1 X Hi-Z 1
Note: Each channel is independently controlled.
The LT1313 is two voltage programmable linear regula-
tors designed specifically for PCMCIA VPP driver applica-
tions. The device operates with very low quiescent current
(60µA) in the 0V and Hi-Z modes of operation. In the Hi-Z
mode, the output leakage current falls to 1µA. In addition
to the low quiescent currents, the LT1313 incorporates
several protection features which make it ideal for PCMCIA
applications. The LT1313 has built-in current limiting
(330mA) and thermal shutdown to protect the device and the
socket VPP pins against inadvertent short-circuit conditions.
Output Capacitance
The LT1313 is designed to be stable with a wide range of
output capacitors. The minimum recommended value is a
1µF with an ESR of 3Ω or less. The capacitor is connected
directly between the output pin and ground. For applications
where space is very limited, capacitors as low as 0.33µF can
APPLICATIONS INFORMATION
WUU U
be used. Extremely low ESR ceramic capacitors with values
less than 1µF must have a 2Ω resistor added in series with
the output capacitor.
Transient and Switching Performance
The LT1313 is designed to produce minimal overshoot
with capacitors in the range of 1µF to 10µF. Larger
capacitor values can be used with a slowing of rise and
fall times.
The positive output slew rate is determined by the 330mA
current limit and the output capacitor. The rise time for a
0V to 12V transition is approximately 40µs and the rise
time for a 10µF capacitor is roughly 400µs (see the
Transient Response curves in the Typical Performance
Characteristics section).
7
LT1313
Calculating Junction Temperature
Example: given an output voltage of 12V, an input supply
voltage of 14V, and an output current of 100mA (one VPP
output), and a maximum ambient temperature of 50°C,
what will the maximum junction temperature be?
Power dissipated by the device will be equal to:
I
OUT
× (V
S
– VPP
OUT
) + (I
GND
× V
IN
)
where,
I
OUT
= 100mA
V
IN
= 14V
I
GND
at (I
OUT
= 100mA, V
IN
= 14V) = 5mA
so,
P
D
= 100mA × (14V –12V) + (5mA × 15V) = 0.275W
Using Table 1, the thermal resistance will be in the range
of 120°C/W to 131°C/W depending upon the copper area.
So the junction temperature rise above ambient will be
less than or equal to:
0.275W × 131°C/W = 36°C
The maximum junction temperature will then be equal to
the junction temperature rise above ambient plus the
maximum ambient temperature or:
T
JMAX
= 50°C + 36°C = 86°C
For more detailed applications information, see the LT1312
Single PCMCIA VPP Driver/Regulator data sheet.
The fall time from 12V to 0V is set by the output capacitor
and an internal pull-down current source which sinks
about 30mA. This source will fully discharge a 1µF capaci-
tor in less than 1ms.
Thermal Considerations
Power dissipated by the device is the sum of two compo-
nents: output current multiplied by the input-output differ-
ential voltage: I
OUT
× (V
IN
– V
OUT
), and ground pin current
multiplied by supply voltage: (I
GND
× V
IN
).
The ground pin current can be found by examining the
Ground Pin Current curves in the Typical Performance
Characteristics section.
Heat sinking, for surface mounted devices, is accom-
plished by using the heat spreading capabilities of the PC
board and its copper traces.
The junction temperature of the LT1313 must be limited to
125°C to ensure proper operation. Use Table 1, in con-
junction with the typical performance graphs, to calculate
the power dissipation and die temperature for a particular
application and ensure that the die temperature does not
exceed 125°C under any operating conditions.
Table 1. 16-Pin SO Package*
COPPER AREA THERMAL RESISTANCE
TOPSIDE BACKSIDE BOARD AREA (JUNCTION-TO-AMBIENT)
2500 sq mm 2500 sq mm 2500 sq mm 120°C/W
1000 sq mm 2500 sq mm 2500 sq mm 120°C/W
225 sq mm 2500 sq mm 2500 sq mm 125°C/W
1000 sq mm 1000 sq mm 1000 sq mm 131°C/W
* Device is mounted on topside.
APPLICATIONS INFORMATION
WUU U
8
LT1313
TYPICAL APPLICATIONS
U
Dual Slot PCMCIA Interface to CL-PD6720
VPP1
VPP2
PCMCIA
CARD SLOT
#1
VCC
VPP1
VPP2
PCMCIA
CARD SLOT
#2
VCC
1313 TA02
5V
ASENSE
AVPPOUT
GND GND
LT1313
VS
VS
AVALID
AEN0
AEN1
BSENSE
BVPPOUT
BVALID
BEN0
BEN1
13V
TO 20V
3.3V/5V
3.3V/5V
51k
VLOGIC
3.3V
10µF
+
1µF
A_VPP_PGM
A_VPP_VCC
AVCC 5V
AVCC 3V
BVCC 5V
BVCC 3V
CIRRUS LOGIC
CL-PD6720
Q1
Si9405DY
Q2
Si9933DY
Q3
Si9933DY
B_VPP_PGM
B_VPP_VCC
VPP_VALID
AVCC 5V
AVCC 3V
BVCC 3V
BVCC 5V
+
1µF
0.1µF
+
3.3V
P-CHANNEL
VCC SWITCHING
5V
10µF
Q4
Si9405DY
Q5
Si9933DY
Q6
Si9933DY
+
OUT1
TO VCC SLOT 1
TO VCC SLOT 2
OUT2
OUT3
GND
LTC1165CS8
VS
IN3
IN1
IN2
5V
5V
5V
N-CHANNEL VCC SWITCHING USING
LTC1165 INVERTING N-CHANNEL DRIVERS
3.3V
Q1
1/2 Si9956DY
Q2
Si9956DY
Q3
Si9956DY
3.3V
5V
Q4
1/2 Si9956DY
Q5
Si9956DY
Q6
Si9956DY
OUT1
OUT2
OUT3
GND
LTC1165CS8
VS
IN3
IN1
IN2
9
LT1313
TYPICAL APPLICATIONS
U
Dual Slot PCMCIA Interface to “365” Type Controller
VPP1
VPP2
PCMCIA
CARD SLOT
#1
V
CC
VPP1
VPP2
PCMCIA
CARD SLOT
#2
V
CC
5V
ASENSE
AVPP
OUT
GND GND
LT1313
V
S
V
S
AVALID
AEN0
AEN1
BSENSE
BVPP
OUT
BVALID
BEN0
BEN1
13V
TO 20V
3.3V/5V
3.3V/5V
51k
V
LOGIC
3.3V
10µF
+
1µF
A_VPP_EN0
A_VPP_EN1
A:GP1
B_VPP_EN0
A_V
CC
_EN0
A_V
CC
_EN1
B_V
CC
_EN0
B_V
CC
_EN1
B_VPP_EN1
B:GP1
“365” TYPE
CONTROLLER
51k
Q3
Si9956DY
Q2
Si9956DY
+
1µF
0.1µF
+
10µF
+
G1
G2
GND
LTC1157CS8
V
S
IN1
IN2
5V
Q1
1/2 Si9956DY
1313 TA03
5V
3.3V
Q4
1/2 Si9956DY
Q6
Si9956DY
Q5
Si9956DY
G1
G2
GND
LTC1157CS8
V
S
IN1
IN2
5V
10
LT1313
TYPICAL APPLICATIONS
U
Dual Slot PCMCIA Driver/Regulator Powered from
Auxiliary Winding on 5V Inductor of LTC1142HV Dual 5V/3.3V Switching Regulator
14V AUXILIARY SUPPLY
D1
MBRS140
D2
MBRS140
D3
MBRS130T3
Q4
VN7002
V
IN
6.5V TO 18V
C4
1000pF
C2
1000pF
C3
220µF
C1
68µF
C5
22µF
1µF
5V
OUTPUT
Q1
10
9
20
LTC1148
SINGLE
5V REG
15
14
V
IN
AEN0
AEN1
AVALID
BEN0
BEN1
BVALID
PDRIVE
NDRIVE
SENSE
+
SENSE
–
NOTE: SEE LT1312 DATA SHEET APPLICATIONS SECTION
FOR FURTHER DETAILS ON THIS CIRCUIT
T1*
1.8T
30µH
Q2
R4
22Ω
R1
100Ω
R3
18k
R2
100ΩR5
0.033Ω
1313 TA04
Q3
VN7002
+
+
+
TO “A” SLOT
VPP PINS
TO “B” SLOT
VPP PINS
FROM “A” SLOT
V
CC
PIN
FROM “B” SLOT
V
CC
PIN
1µF
+
+
ASENSE
AVPP
OUT
GND GND
LT1313
V
S
V
S
AEN0
AEN1
BSENSE
BVPP
OUT
BVALID
BEN0
BEN1
AVALID
*LPE-6562-A026 DALE (605) 655-9301
11
LT1313
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
U
Dimensions in inches (millimeters) unless otherwise noted.
S Package
16-Lead Narrow Plastic SOIC
0.016 – 0.050
0.406 – 1.270
0.010 – 0.020
(0.254 – 0.508)× 45°
0° – 8° TYP
0.008 – 0.010
(0.203 – 0.254)
12345678
0.150 – 0.157*
(3.810 – 3.988)
16 15 14 13
0.386 – 0.394*
(9.804 – 10.008)
0.228 – 0.244
(5.791 – 6.197)
12 11 10 9
SO16 0893
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
12
LT1313
LT/GP 0994 10K • PRINTED IN USA
LINEAR TECHN OLOGY CORPORATION 1994
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
●
FAX
: (408) 434-0507
●
TELEX
: 499-3977
RELATED PARTS
See PCMCIA Product Family table on the first page of this data sheet.